Improvement in compositions for cement roofing



NITED STATES ATENT Orrica.

JOSEPH DITTO AND HENRY VAN BERGEN, OF NEW YORK, N. Y.

IMPROVEMENT IN COMPOSITIONS FOR CEMENT ROOFING.

Specification forming part of Letters Patent N 0. 25,182, dated August23, 1859.

.To all whom it may concern:

Be it known that we, JOSEPH DITTO and HENRY VAN BERGEN, of New York, inthe county of New York and State of New York, have invented new anduseful Improvements in Compound Cement- Roofing; and we do herebydeclare that the following is a full and exact description of the same,reference being had to the accompanying samples or specimens.

The nature of our invention consists in the use of the residuum in themanufacture of kerosene-oil with other water-proof glutinousmaterians-such as coal-tar .oil, turpentine, and varnish, &c.all oreither of them to be compounded and spread onto the object to be coveredwith a stiff brush, and then covered with fine dry mica, the residuumbeing the product of cannel-coal in the manufacture of kerosene-oil. Itis of a tough oily nature and of great endurance, and when compoundedwith the other materials is peculiarly adapted to sustain the moisture,and by its oily character and toughness offers an entire resistance towater, that is so essential to roofing cement or paint that it maywithstand the contraction and expansion of metal and other materialscaused by the great changes in our climate.

To enable others skilled in the art to make and use our invention wewill proceed to describe its construction and operation.

We take one-third to one-eighth (as per climate) of the residuum in themanufacture of kerosene-oil, and two thirds to seven-eighths ofcoal-tar, add one twentieth part of pulverized manganese and two poundsof beeswax to forty gallons of the other material, after which theabove-named are to be submitted to a steady heat of about 212 Fahrenheituntil they are completely dissolved, and all foreign substancesas water,creosote, naptha, benzole-and other objectionable matter shall beremoved from the combination. Then add one gallon of common molasses andabout one-half a pound of short-cut hair, reduced to a suitable lengthto mix conveniently. After all are thoroughly mixed together it is readyfor use, and in mild weather can be ap-- plied in a cold state with astiff brush-such as is used in whitewashing. When it has been so applieda moderate quantity of prepared mica or clean sand may be sprinkled overit, and when the first coat is dry and hard a second coat may be put onin the same manner and completely covered evenly with the prepared mica.After remaining two or three days to harden, if it be on tin, the loosemica should be swept oif and the mica rolled or smoothed down,when theroof is completed.

To make an entire roof on sheathing-boards we first cover the boardswith tarred paper prepared for the purpose, tacking it slightly,beginning at the bottom of the roof and lapping each joint about twoinches, so proceed to the top. Then take Atlantic or any other heavybrown sheeting. After shrinking the same cover the paper, beginningbelow and proceeding as with the paper, lapping the joints at least twoinches, and tacking the sheeting once in one and a half inch. The cementmay now be spread on, care being taken that the cloth shall becompletely saturated with it, and also to rub it under the cloth at thejoints. After the first coat is on a light coat of mica or sand may besprinkled over it. The second coat may be put on as soon as the first issufficiently dry to walk over, to do which proceed in the same manner,adding an additional quantity of mica or sand. After the second coat issufticiently hard the third coat can be applied in the same manner,covering it completely with mica or sand, as the case may be, and afterone or two days it may be swept 0E and smoothed down, and the roof isfinished.

- Having thus described our invention, what we claim as new, and desireto secure by Letters Patent, is

The composition prepared and composed of the materials described in theproportions set forth, for the purpose of forming cement for roofingpurposes.

JOSEPH DITTO. HENRY VAN BERGEN.

Witnesses:

WM. A. BACON, GEO. F. GRAY.

